Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d018c427658cd0a8f041be340653ea9ad782f06cc4a69cf7626f60ef9489654' 
  AND token = 'nW2JyMZ5h2AOMXlb53Kd+NWAAdA7QSMNXaow/KnbN1k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}